Nested Element

ConfirmationCallback has one nested element
named OptionValues. The OptionValues element
provides a list or an array of button text information to be rendered
on the UI page.OptionValues takes no attributes.

If there is only one button on the UI page, then the module
is not required to send this callback. If ConfirmationCallback is
not provided through the Authentication Module properties XML file,
then anAuthUI.properties will be used to pick
and display the button text or label for the Login button. anAuthUI.properties is the global UI i18n properties file for all modules.

Callbacks length value should be adjusted accordingly after
addition of the new callback.